1317279743 has 4 divisors (see below), whose sum is σ = 1418608968. Its totient is φ = 1215950520.

The previous prime is 1317279737. The next prime is 1317279749. The reversal of 1317279743 is 3479727131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1317279737) and next prime (1317279749).

It is a cyclic number.

It is not a de Polignac number, because 1317279743 - 2⁴ = 1317279727 is a prime.

It is a super-3 number, since 3×1317279743³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1317279694 and 1317279703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317279749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50664593 + ... + 50664618.

It is an arithmetic number, because the mean of its divisors is an integer number (354652242).

Almost surely, 2^1317279743 is an apocalyptic number.

1317279743 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1317279743 is a deficient number, since it is larger than the sum of its proper divisors (101329225).

1317279743 is a wasteful number, since it uses less digits than its factorization.

1317279743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101329224.

The product of its digits is 222264, while the sum is 44.

The square root of 1317279743 is about 36294.3486372190. The cubic root of 1317279743 is about 1096.2072526949.

The spelling of 1317279743 in words is "one billion, three hundred seventeen million, two hundred seventy-nine thousand, seven hundred forty-three".